The robber, who wore a Halloween-style mask, displayed a gun in a hold-up at the Circle K in the 9300 block of Paseo Montalban about 4:30 a.m. Thursday, said San Diego police Officer Frank Cali. The same man held up the store about 3 a.m. Wednesday, police said.

In both cases, the robber showed a clerk ---- the same one on duty each time ---- a black pistol tucked into his waistband and demanded cash and cigarettes, police said.

The man was described as Latino, about 5 feet 7 inches tall and 20 to 30 years old, police said. He wore gloves with hand-bone designs on the back and black clothing, including a jacket and baseball cap.

Anyone with information about the case is asked to call Crime Stoppers at 888-580-8477.